Gearing



(No Model.)

A. M. BENSON.

GEARING Patented June 25, 1889 I an (am-to 2a. 7%

witnesses X I UNITED STATES PATENT OFFICE.

ARZA M. BENSON, OF CLEVELAND, OHIO.

GEARING.

SPECIFICATION forming part of Letters Patent No. 405,? 59, dated June25, 1889.

Application filed December 29, 1888. Serial No. 294,958. (No model.)

To all whom it may concern.-

Be it known that I, ARZA M. BENSON, a citizen of the United States, anda resident of Cleveland, county of Ouyahoga, and State of Ohio, haveinvented certain new and useful Improvements in Gearing, of which thefollow ing is a specification, the principle of the invention beingherein explained, and the best mode in which I have contemplatedapplying that principle so as to distinguish it from other inventions.

My invention more particularly relates to improvements in that class ofgearing adapted to be operated without backlash; and the improvementsconsist in the combination of parts hereinafter described and claimed.

Referring to the drawings, Figure 1 is a central sectional view througha gear and its connecting-web. Fig. 2 is a plan view of theconnecting-gears. Fig. 3 is an elevation of the cutter-heads, certainparts of the gear also being shown.

Gears A A, preferably made as steel castings with out teeth, arerespectively secured to shafts a a, which said latter shaft is connectedup to any suitable driving-power, while gearA is moved solely by contactwith gear A. Each said gear is cast with web 0, located to one side ofthe longitudinal center of the gear-teeth, and with hub 0', also formedto one side of said center line. I am thus enabled to journal the shaftsmore closely to said webs than as though the hubs projected on bothsides of the center of the gear.

The shafts a (1, are located slightly angular to each other, in order togive the cutterknives the proper inclination toward each other to formthe bilge of the stave. This necessitates 1n akin g the gears ofslightly-greater diameter on one edge (Z of their periphery than on theopposite edge (1.

Friction-wheelE is a casting provided with hub e and has the plain-facedperiphery e. The hub of said web friction-whecl is driven over thegear-hub until the rim of the friction-wheel is in engagement with theside of the gear-teeth, the periphery of said web friction-wheelextending to the pitch-line of the teeth, leaving the outer half of theteeth exposed beyond the periphery of said friction-wheel. Set-screwfsecures the frictionwheel and gear-hubs together.

I preferably secure the friction-wheel on the large side of thegear-wheels; but may 10- cate it 011 either or both sides of the same.The peripheries e of the friction-wheels are respectively smooth-facedand engage with each other. The extremities g of the cutterheadsinterfit with the spaces g of the complementary heads as they bothrevolve.

The foregoing description and accompanying drawings set forth in detailmechanism an embodiment of my invention. Change may be made therein,provided the principles of construction respectively recited in thefollowing claims are employed.

I therefore particularly point out and distinctly claim as myinvention 1. The combination, with the two rotary shafts a a, locatedangularly to each other, and the two gears A A, each of greater diameterat one peripheral edge than at the other, and having hubs c c, of thetwo platesides of the gears which are of greatest diameter, each saidplate-disk having its periphery in lateral engagement with the ends ofthe teeth of its respective gear, while its portion intermediate of itscenter and periphery is free from said gear, substantially as set forth.

2. The combination, with two rotary shafts a a, located angularly toeach other, and the two gears A A, each of greaterdiameter at oneperipheral edge than at the other, and formed with a web located nearerthe larger diametrical side, and having hubs c c, projecting only fromsaid larger diametrical side of the gears, of the two plate-disks E E,respectively, having hubse e, mounted on said gear-hubs c 0, next to thesides of the gears which are of greatest diameter, and the fasteningdevice f, each said plate-disk being secured by said hub and fasteningmeans and having its periphery in lateral contact with the ends of theteeth of its respective gear, whileits body portion is free from thegear-web, substantially as set forth.

In testimony that I claim the foregoing to be my invention I havehereunto setmyhand this 26th day of December, A. D. 1888.

ARZA M. BENSON. lVitnesses:

J. B. FAY, THos. B. HALL.

disks E E, mounted on said hubs next to the

